Improvement in spectacles



y waited tant pam ont CCLIN CREE sT. CLAIR., ontneemt, MICHIGAN. j

Letters Patent No. 104,( i56, 1latezl June 2l, 1870.

IMPROVEMENT IN SPECTACLES.

:The Schedine referred to in these Letters Patent and making part of the same.

, To whom it 'may concern Be it known `that I, COLIN` Gann ST. CLAIR, ol' Detroit, in the county of Wayne and vState of Michigan, have invented a new and useful Improvement in Spectacles; and I dodeclarc that the following is a.

true and accurate description thereof', reference being had to the accompanying drawing, andto the letters of reference marked thereon and being a part of this y specification, in which-'- Figure 1 is a perspective view of a pair of spectacles provided with my improved bows, and Figure 2 is a similar view of another pair, showing a modification of t-he bows and a projecting bridge.

Like letters indicate like parts ineach figure.

The nature of this invention relates to an improvement in the construction o1' spectacles, and

It consists in the employment of hooks'at the ends Iof the bows. which hooks enter the ea'rs ofthe wearer, v

engaging wit-l1` the cartilage in the upperaud fore part of the ear, and thus -rrnly hold the spectacles in place in the plane of vision.

Also, in the peculiar construction of the bridgepiece, in such a manner that, while the saine may be held'rmly up againstthe bridge of the wearers nose,

the glasses are carriedforward, so as not to be swept v by his eye-lashes, thereby avoiding the frequent necessityl of removing the spectacles to wipe the glasses.

In the dlawingp 4 Arepresents in fig. l'th'e bridge-piece of a pair of reversible spectacles, connecting the frames B, to the 'e'nds of which are hinged the bows O.

To the ends ofthe bows are connected light and elastic metal extensions C, having a, slight movement in a short slot, a, `in the en'ds of eachbow.

To the ends of the extensions are attached the hooks D, which engagenith the cartilage `of tbc car, and

thereby firmly retain the spectacles in position, with the bridge-piece pressing against the highest or verti- 4 cal portion ofthe bridge of the wearers nose.

When once adjusted to their proper positions in the slots, the extensions are not to be moved therein, but should have their rivets tightened in place.

It will be noticed that the bridge-piece in iig. 1 is not curved ont of a'horizontal plane, but that the central part is curved outward, to set around the bridge -of the nose, while the ends are curved forward again,

so as to carry the glasses out of the reach of theeyelashes. 'Y

With 'this form ol bridge-piece, the spectacles may be worn either side up. 4

In lig. 2 is shown a modification of the bridge-piece described. In this case the spectacles are not reversible, as the bridge-piece is bent in its middle upward and backward, bringing the centers. of the glasses Vslightly below the plane of the eyes, to adapt them for use in work which requires the wearer to look l down upon it, as in writing.

By curving the bridge-piece to the rear, the glasses v are carried further away from the eyes, allowing of a free circulation of airbetween the eyes and'glasses, which is a great relief tothe wearer in warm Weather, and prevents them from being dimmed by perspiration dropping on them froml the' forehead, in stoop-` in". Y l-n this figure, the extensions O 'of the bows, shown in lig. 1, are replaced with elastic webbing O?, to the ends of which the ear-books D are secured, dispensing with the slots-in the bows, for adjusting the extensions G,an d lesseningthe cost of the spectacles. 'What I claim as my invention, and desire to secure by Letters Patent,is'

1. Inspectacles, the ear-hooks D, as and for the purpose set forth.

2. The bridge-piece A, `having its endsturned outward from the body thereof, so as to throw the glassframes away from the wearers eyes, substantially as described. i A, n Witnesses: court Cnnn sr, CLAIR.

SAM. J. Senn, FREDERICK Eshn'rs. 

